Any guest staying with the Tenant for longer than ten (10) days shall be considered an occupant of the Premises.' ... then the section goes on about behavior and how to make changes and what not.My main concern is I have a couch surfing brother and must remain firm and consistent to not have that bag open up, thus far that has been entirely evaded.

Not your couch potato office-mate.  

Current tenants include Jiffy Lube, Subway, Wienershnitzel and a variety of daily needs service providersCHINO HILLSSeveral new businesses have submitted plans to the City of Chino Hills to locate to The Shoppes at Grand Avenue and Peyton Drive, off the 71 Freeway.According to the City, the former New York & Company women’s clothing store has been divided into three suites for the following businesses: Removery, a tattoo removal and fading service to be located adjacent to Gemorie; Love Sac, a furniture retailer that includes couches with surround sound delivered by speakers embedded in the couch to be located next to Sleep Number; and Cava, a Mediterranean food restaurant that would face the parking lot near Panera Bread.In addition, Brunk’s Butchery will move into the former Smashburger storefront.

I'd go to Wayfair for couch and coffee tables also.

At any time can you review this and turn to anyone with hand up for a high-five and say "THAT's it, oh-man, those pan pics, who wouldn't book it, pow right there, close up of a couch corner, done book me now".     

No, everybody gets a kitchen, a bedroom, a couch, a bathroom, and a dining table in Malibu or Beverly Hills.

Let Master MSOOTKAUG have the mic for a sec.

If you have room get a giant tv a couch and re cover that pool table.

Let's say they're selling a couch - have a friend message them asking where to buy the couch - you could get the tenants' address that way too - it's a long-shot but would be worth a try if the USPS method doesn't work.

Keep the letter positive and couched toward creating a great relationship between you & Tenants.